第十二章：生产部署与运维

// 高可用RPC节点管理
class HighAvailabilityProvider {
    private providers: ethers.JsonRpcProvider[] = [];
    private healthScores: Map = new Map();
    private currentIndex: number = 0;
    
    constructor(rpcUrls: string[]) {
        // 初始化多个RPC提供者
        for (const url of rpcUrls) {
            this.providers.push(new ethers.JsonRpcProvider(url));
            this.healthScores.set(url, 100);
        }
        
        // 定期健康检查
        setInterval(() => this.healthCheck(), 30000);
    }
    
    async call(method: string, params: any[]): Promise {
        const maxRetries = 3;
        let lastError: Error | null = null;
        
        for (let retry = 0; retry < maxRetries; retry++) {
            const provider = this.getHealthyProvider();
            
            try {
                const result = await provider.send(method, params);
                this.updateHealthScore(provider, true);
                return result;
            } catch (error) {
                lastError = error as Error;
                this.updateHealthScore(provider, false);
                
                // 如果是关键错误，立即切换节点
                if (this.isCriticalError(error)) {
                    this.markProviderUnhealthy(provider);
                }
            }
        }
        
        throw new Error(`All providers failed: ${lastError?.message}`);
    }
    
    private getHealthyProvider(): ethers.JsonRpcProvider {
        // 基于健康分数的加权随机选择
        const healthyProviders = this.providers.filter(p => 
            this.healthScores.get(p.connection.url) > 30
        );
        
        if (healthyProviders.length === 0) {
            // 所有节点都不健康，重置分数并重试
            this.resetHealthScores();
            return this.providers[0];
        }
        
        // 轮询选择
        this.currentIndex = (this.currentIndex + 1) % healthyProviders.length;
        return healthyProviders[this.currentIndex];
    }
    
    private async healthCheck() {
        for (const provider of this.providers) {
            try {
                const start = Date.now();
                const block = await provider.getBlock('latest');
                const latency = Date.now() - start;
                
                // 基于延迟和区块时间更新健康分数
                if (block && latency < 1000) {
                    this.healthScores.set(provider.connection.url, 
                        Math.min(100, this.healthScores.get(provider.connection.url)! + 10)
                    );
                } else {
                    this.healthScores.set(provider.connection.url,
                        Math.max(0, this.healthScores.get(provider.connection.url)! - 20)
                    );
                }
            } catch {
                this.healthScores.set(provider.connection.url, 0);
            }
        }
    }
}

// 告警规则引擎
class AlertingEngine {
    private rules: AlertRule[] = [];
    private notifications: NotificationChannel[] = [];
    
    constructor() {
        this.initializeRules();
        this.setupNotificationChannels();
    }
    
    private initializeRules() {
        // 价格稳定性告警
        this.addRule({
            name: 'peg_deviation_critical',
            condition: (metrics: StablecoinMetrics) => 
                Math.abs(metrics.business.pegDeviation) > 0.05,
            severity: 'critical',
            cooldown: 300, // 5分钟冷却期
            actions: ['pagerduty', 'telegram', 'email'],
            message: (metrics) => 
                `CRITICAL: Stablecoin peg deviation ${metrics.business.pegDeviation * 100}%`
        });
        
        // 储备率告警
        this.addRule({
            name: 'reserve_ratio_low',
            condition: (metrics) => metrics.business.reserveRatio < 1.05,
            severity: 'high',
            cooldown: 600,
            actions: ['telegram', 'email'],
            message: (metrics) => 
                `WARNING: Reserve ratio below safety threshold: ${metrics.business.reserveRatio}`
        });
        
        // 异常交易模式
        this.addRule({
            name: 'suspicious_activity',
            condition: (metrics) => {
                const recent = metrics.security.suspiciousTransactions;
                return recent > 10; // 最近1小时超过10笔可疑交易
            },
            severity: 'medium',
            cooldown: 1800,
            actions: ['security_team'],
            message: (metrics) => 
                `Suspicious activity detected: ${metrics.security.suspiciousTransactions} transactions`
        });
        
        // Gas价格异常
        this.addRule({
            name: 'gas_spike',
            condition: (metrics) => 
                metrics.technical.gasPrice > 500n * 10n**9n, // 500 gwei
            severity: 'medium',
            cooldown: 300,
            actions: ['ops_team'],
            message: (metrics) => 
                `High gas prices detected: ${ethers.formatUnits(metrics.technical.gasPrice, 'gwei')} gwei`
        });
    }
    
    async evaluateRules(metrics: StablecoinMetrics) {
        for (const rule of this.rules) {
            if (rule.condition(metrics)) {
                // 检查冷却期
                if (!this.isInCooldown(rule)) {
                    await this.triggerAlert(rule, metrics);
                }
            }
        }
    }
    
    private async triggerAlert(rule: AlertRule, metrics: StablecoinMetrics) {
        const alert = {
            rule: rule.name,
            severity: rule.severity,
            message: rule.message(metrics),
            timestamp: new Date(),
            metrics: this.extractRelevantMetrics(rule, metrics)
        };
        
        // 发送到配置的通知渠道
        for (const action of rule.actions) {
            const channel = this.notifications.find(n => n.name === action);
            if (channel) {
                await channel.send(alert);
            }
        }
        
        // 记录告警历史
        await this.logAlert(alert);
        
        // 设置冷却期
        this.setCooldown(rule);
    }
}

// 数据迁移合约
contract DataMigration {
    // 旧版本存储布局
    struct OldUserData {
        uint256 balance;
        uint256 lastUpdate;
        bool isActive;
    }
    
    // 新版本存储布局
    struct NewUserData {
        uint256 balance;
        uint256 lastUpdate;
        bool isActive;
        uint256 tier;           // 新增字段
        uint256 rewardsEarned;  // 新增字段
        address referrer;       // 新增字段
    }
    
    // 批量迁移配置
    uint256 public constant BATCH_SIZE = 100;
    uint256 public migrationProgress;
    bool public migrationComplete;
    
    mapping(address => OldUserData) private oldStorage;
    mapping(address => NewUserData) public newStorage;
    address[] public userAddresses;
    
    event MigrationBatch(uint256 startIndex, uint256 endIndex);
    event MigrationCompleted(uint256 totalUsers);
    
    function migrateBatch() external {
        require(!migrationComplete, "Migration already complete");
        
        uint256 startIndex = migrationProgress;
        uint256 endIndex = Math.min(
            startIndex + BATCH_SIZE,
            userAddresses.length
        );
        
        for (uint256 i = startIndex; i < endIndex; i++) {
            address user = userAddresses[i];
            OldUserData memory oldData = oldStorage[user];
            
            // 迁移数据并设置默认值
            newStorage[user] = NewUserData({
                balance: oldData.balance,
                lastUpdate: oldData.lastUpdate,
                isActive: oldData.isActive,
                tier: calculateInitialTier(oldData.balance),
                rewardsEarned: 0,
                referrer: address(0)
            });
            
            // 清理旧数据以节省gas
            delete oldStorage[user];
        }
        
        migrationProgress = endIndex;
        emit MigrationBatch(startIndex, endIndex);
        
        if (migrationProgress >= userAddresses.length) {
            migrationComplete = true;
            emit MigrationCompleted(userAddresses.length);
        }
    }
    
    function calculateInitialTier(uint256 balance) private pure returns (uint256) {
        if (balance >= 1000000 * 10**18) return 3; // 鲸鱼
        if (balance >= 10000 * 10**18) return 2;   // 大户
        if (balance >= 100 * 10**18) return 1;     // 活跃用户
        return 0; // 普通用户
    }
    
    // 数据验证
    function verifyMigration(address[] calldata users) external view returns (bool) {
        for (uint256 i = 0; i < users.length; i++) {
            address user = users[i];
            OldUserData memory oldData = getOldData(user);
            NewUserData memory newData = newStorage[user];
            
            // 验证关键数据完整性
            if (oldData.balance != newData.balance ||
                oldData.lastUpdate != newData.lastUpdate ||
                oldData.isActive != newData.isActive) {
                return false;
            }
        }
        return true;
    }
}

// 审计日志服务
class AuditLogger {
    private storage: AuditStorage;
    private encryption: EncryptionService;
    
    constructor() {
        this.storage = new AuditStorage();
        this.encryption = new EncryptionService();
    }
    
    async logTransaction(tx: Transaction) {
        const auditEntry: AuditEntry = {
            id: generateAuditId(),
            timestamp: Date.now(),
            type: 'TRANSACTION',
            actor: tx.from,
            action: tx.function,
            target: tx.to,
            value: tx.value,
            data: {
                txHash: tx.hash,
                blockNumber: tx.blockNumber,
                gasUsed: tx.gasUsed,
                status: tx.status
            },
            metadata: {
                ip: await this.getActorIP(tx.from),
                userAgent: await this.getUserAgent(tx.from),
                complianceLevel: await this.getComplianceLevel(tx.from)
            }
        };
        
        // 加密敏感数据
        const encryptedEntry = await this.encryption.encrypt(auditEntry);
        
        // 存储到不可变存储
        await this.storage.store(encryptedEntry);
        
        // 实时合规检查
        await this.checkCompliance(auditEntry);
    }
    
    async generateComplianceReport(
        startDate: Date,
        endDate: Date,
        jurisdiction: string
    ): Promise {
        const entries = await this.storage.query({
            startDate,
            endDate,
            filters: { jurisdiction }
        });
        
        const report: ComplianceReport = {
            period: { start: startDate, end: endDate },
            jurisdiction,
            summary: {
                totalTransactions: entries.length,
                totalVolume: this.calculateVolume(entries),
                uniqueUsers: this.countUniqueUsers(entries),
                suspiciousActivities: this.filterSuspicious(entries).length
            },
            userMetrics: await this.aggregateUserMetrics(entries),
            riskIndicators: await this.calculateRiskIndicators(entries),
            regulatoryMetrics: this.getJurisdictionMetrics(entries, jurisdiction)
        };
        
        // 生成PDF报告
        const pdf = await this.generatePDF(report);
        
        // 数字签名
        const signedReport = await this.signReport(pdf);
        
        return signedReport;
    }
    
    private async checkCompliance(entry: AuditEntry) {
        // 实时合规规则引擎
        const rules = await this.loadComplianceRules(entry.metadata.jurisdiction);
        
        for (const rule of rules) {
            if (rule.evaluate(entry)) {
                await this.handleComplianceViolation(entry, rule);
            }
        }
    }
}

// 生产部署检查清单
class ProductionReadinessChecker {
    private checks: Check[] = [];
    
    constructor() {
        this.initializeChecks();
    }
    
    private initializeChecks() {
        // 合约安全检查
        this.addCheck({
            name: 'Contract Security Audit',
            category: 'Security',
            severity: 'Critical',
            check: async () => {
                const auditReports = await this.getAuditReports();
                return {
                    passed: auditReports.length >= 2 && 
                           auditReports.every(r => r.criticalIssues === 0),
                    message: `${auditReports.length} audits completed`,
                    details: auditReports
                };
            }
        });
        
        // 多签配置检查
        this.addCheck({
            name: 'Multisig Configuration',
            category: 'Governance',
            severity: 'Critical',
            check: async () => {
                const multisig = await this.getMultisigConfig();
                return {
                    passed: multisig.threshold >= 3 && 
                           multisig.owners.length >= 5,
                    message: `${multisig.threshold}/${multisig.owners.length} multisig`,
                    details: multisig
                };
            }
        });
        
        // 监控配置检查
        this.addCheck({
            name: 'Monitoring Setup',
            category: 'Operations',
            severity: 'High',
            check: async () => {
                const monitors = await this.getMonitoringStatus();
                const required = ['prometheus', 'grafana', 'alertmanager', 'pagerduty'];
                const configured = required.filter(m => monitors[m]?.isActive);
                
                return {
                    passed: configured.length === required.length,
                    message: `${configured.length}/${required.length} monitors active`,
                    details: monitors
                };
            }
        });
        
        // 备份策略检查
        this.addCheck({
            name: 'Backup Strategy',
            category: 'Disaster Recovery',
            severity: 'High',
            check: async () => {
                const backups = await this.getBackupConfig();
                return {
                    passed: backups.frequency <= 86400 && // 至少每日备份
                           backups.locations.length >= 3 &&
                           backups.lastTestRestore < 7 * 86400, // 最近7天测试过
                    message: `Backups to ${backups.locations.length} locations`,
                    details: backups
                };
            }
        });
        
        // 性能基准检查
        this.addCheck({
            name: 'Performance Benchmarks',
            category: 'Performance',
            severity: 'Medium',
            check: async () => {
                const benchmarks = await this.runBenchmarks();
                return {
                    passed: benchmarks.tps >= 100 &&
                           benchmarks.latencyP99 < 1000 &&
                           benchmarks.gasEfficiency > 0.8,
                    message: `${benchmarks.tps} TPS, ${benchmarks.latencyP99}ms P99`,
                    details: benchmarks
                };
            }
        });
    }
    
    async runAllChecks(): Promise {
        const results: CheckResult[] = [];
        let criticalPassed = true;
        let highPassed = true;
        
        for (const check of this.checks) {
            console.log(`Running check: ${check.name}...`);
            const result = await check.check();
            results.push({
                ...check,
                result
            });
            
            if (!result.passed) {
                if (check.severity === 'Critical') criticalPassed = false;
                if (check.severity === 'High') highPassed = false;
            }
        }
        
        return {
            timestamp: new Date(),
            overallStatus: criticalPassed && highPassed ? 'READY' : 'NOT_READY',
            results,
            recommendations: this.generateRecommendations(results)
        };
    }
}